覆盖作物支持农业生态系统的气候变化缓解潜力
Jonas Schön1, Norman Gentsch2, Peter Breunig1
1Weihenstephan-Triesdorf University of Applied Sciences, Triesdorf, Germany.
PloS one
|May 8, 2024
概括
覆盖作物通过减少农业影响,显著减轻气候变化. 在欧盟,在玉米之前种植覆盖作物可以将农业排放量减少13%.
科学领域:
- 农业科学 农业科学
- 气候变化缓解缓解 气候变化缓解
- 生态系统服务生态系统服务
背景情况:
- 农业对生态系统产生重大影响,并对气候变化作出贡献.
- 覆盖作物提供了一个潜在的策略来减少这些负面影响.
- 量化覆盖作物的净气候影响,包括土地利用,至关重要.
研究的目的:
- 量化玉米生产系统中覆盖作物的净气候变化缓解影响 (NCCMI).
- 确定和权衡与覆盖作物相关的气候效益和成本的主要驱动因素.
- 评估广泛采用覆盖作物的潜在欧盟气候缓解影响.
主要方法:
- 系统的文献和数据审查,以确定覆盖作物气候效益和成本的关键驱动因素.
- 开发四种场景,对已识别的驱动因素有不同的影响权重.
- 根据确定的收益 (例如,碳土地收益,碳封存) 和成本 (例如,种子生产排放,土地收益放弃) 来计算NCCMI.
主要成果:
- 覆盖作物在所有分析的场景中都显示出3.30Mg CO2e ha-1 a-1的阳性NCCMI.
- 碳土地效益 (34.5%) 和碳封存 (33.8%) 是气候效益的主要贡献者.
- 气候成本,包括种子生产和放弃土地使用,仅占总收益的15.8%.
结论:
- 覆盖作物在玉米生产中对减缓气候变化产生了相当大的净积极影响.
- 在欧盟广泛采用覆盖作物可能会导致农业温室气体排放量大幅减少.
- 将覆盖作物纳入可持续农业系统对于最大限度地减少农业环境足迹至关重要.
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